LHCB5 — Cucumis sativus

Summary

CsLHCB5 (CSA_5G646700) on cucumber chromosome 5 encodes a chlorophyll a-b binding protein with chlorophyll-binding, serine-type endopeptidase, and 7-hydroxymethyl chlorophyll a reductase activities, and is associated with protein-folding chaperone activity. It localises to the photosystem II antenna complex, LHCII, thylakoid membrane, and chloroplast thylakoid. The gene is associated with photosynthesis, light harvesting in both photosystems I and II, nonphotochemical quenching, photosystem II repair and assembly, chlorophyll cycling and metabolism, starch breakdown, phenylpropanoid and secondary metabolism, lignin and ethylene anabolism, hormone metabolism, adventitious root development, DNA replication licensing, and leaf senescence. Phenotypic associations include photoprotection, photosynthetic rate, violaxanthin de-epoxidation, stomatal response to abscisic acid, and energy transfer efficiency. Studies of related genes in other species link the family to drought tolerance, abscisic acid sensitivity, and sodium concentration.